Riding lawn mower



FIG. 1 is a perspective view of a riding lawn mower;

FIG. 2 is a front end view of a riding lawn mower;

FIG. 3 is a rear end view of a riding lawn mower;

FIG. 4 is a top view of a riding lawn mower;

FIG. 5 is a right side view of a riding lawn mower; and,

FIG. 6 is a left side view of a riding lawn mower. 

The ornamental design for a riding lawn mower, as shown. 